PCB Reverse Engineering, also known as PCB CLONE or PCB Copy, is using clone technology onto the PCB which was designed and manufactured by others, it is to use PCB related software to copy someone else’s circuit board and then manufacture the circuit board by yourself. This is the tradditional explanation for the PCB Clone. with the PCB CLONE technology development, the impact and scope of this industry continues to expand rapidly, and the definition of PCB CLONE also extend from the narrow sense

Flexible circuits offer some unique challenges to the assembly process. The assembly materials and processes for populating and interconnecting components to a flexible circuit range are essentially identical to those used for standard rigid or rigid flex pcb, but there are some twists required, as will be shown. The assembly processes range from very simple methods, such as manual component insertion and hand soldering (which requires little or no fixturing), to fully automated methods, which normally

1.) seperate the power grounds, signal grounds, analog grounds, digital grounds, control grounds
2.) Keep inputs and outputs seperated and isolate to prevent oscillations
3.) Oscillation can happen from the inverting input and non-ineverting input of op-amps, coupling between parallel signal traces
4.) Place Capacitors that bypass supply voltages or decouple very close to the IC chip pins
5.) Use VIAS for signal grounds
6.) Keep power and ground track/traces

As is well known, solderability is very important for the printed circuit boards, we must do solderability test of each batch PCB we made. In this way we can inspect the weldability of the PCB before we go ahead the assembly process, much helpful for SMT.

Today we are going to discuss the solderability test experiment. In order to explain it more clear, we now do a simple solderability test and show you all the steps.